import { login, logout, getInfo } from '@/api/user'
import { getToken, setToken, removeToken } from '@/utils/auth'
import router, { resetRouter } from '@/router'

const state = {
    token: getToken(),
    name: '',
    avatar: '',
    introduction: '',
    roles: [],
}

const mutations = {
    SET_TOKEN: (state, token) => {
        state.token = token
    },
    SET_INTRODUCTION: (state, introduction) => {
        state.introduction = introduction
    },
    SET_NAME: (state, name) => {
        state.name = name
    },
    SET_AVATAR: (state, avatar) => {
        state.avatar = avatar
    },
    SET_ROLES: (state, roles) => {
        state.roles = roles
    },
   

}

const actions = {
    // user login
    login({ commit }, userInfo) {
        const { username, password } = userInfo
        return new Promise((resolve, reject) => {
            
            login({ username: username.trim(), password: password }).then(response => {
                //const { data } = response
                if(response.code === 200){
                    commit('SET_TOKEN', response.data.token)
                    setToken(response.data.token)
                    resolve(response)
                }else{
                    resolve(response)
                }
            }).catch(error => {
                reject(error)
            })
        })
    },

    // get user info
    getInfo({ commit, state }) {
        return new Promise((resolve, reject) => {
            getInfo(state.token).then(response => {
                const { data } = response

                if (!data) {
                    reject('Verification failed, please Login again.')
                }

                const { roles, name, avatar, introduction } = data

                // roles must be a non-empty array
                if (!roles || roles.length <= 0) {
                    reject('getInfo: roles must be a non-null array!')
                }

                //模拟从后端拿到 菜单列表
                const menus = [
                    {
                        path: '/book',
                        component: 'Layout',
                        meta: {
                            title: '博客文章管理',
                            roles: ['admin'],
                            icon: 'edit'
                        },
                        name: '博客文章管理',
                        //redirect : 'create',
                        //redirect:'noRedirect',

                        children: [
                            {
                                path: 'create',
                                //component: 'book/create',
                                component: 'book/create',
                                // component: () => import('@/views/book/create'),
                                name: '图书管理', //必须设置name 在TagsView 才会显示
                                meta: {
                                    title: '图书管理',
                                    icon: 'edit',
                                    roles: ['admin']
                                },

                            },
                            {
                                path: 'page',
                                component: 'permission/page',
                                name: 'PagePermission',
                                meta: {
                                    title: 'Page Permission',
                                    roles: ['admin'] // or you can only set roles in sub nav
                                }
                            },
                        ]

                    },

                    {
                        path: '/permission',
                        component: 'Layout',
                        redirect: '/permission/page',
                        alwaysShow: true, // will always show the root menu
                        name: 'Permission',
                        meta: {
                            title: 'Permission',
                            icon: 'lock',
                            roles: ['admin', 'editor'] // you can set roles in root nav
                        },
                        children: [
                            {
                                path: 'page',
                                component: 'permission/page',
                                name: 'PagePermission',
                                meta: {
                                    title: 'Page Permission',
                                    roles: ['admin'] // or you can only set roles in sub nav
                                }
                            },
                            {
                                path: 'directive',
                                component: 'permission/directive',
                                name: 'DirectivePermission',
                                meta: {
                                    title: 'Directive Permission'
                                    // if do not set roles, means: this page does not require permission
                                }
                            },
                            {
                                path: 'role',
                                component: 'permission/role',
                                name: 'RolePermission',
                                meta: {
                                    title: 'Role Permission',
                                    roles: ['admin']
                                }
                            }
                        ]
                    },

                ]
                commit('SET_ROLES', roles)
                commit('SET_NAME', name)
                commit('SET_AVATAR', avatar)
                commit('SET_INTRODUCTION', introduction)
                //commit('SET_MENUS', menus)
                resolve(data)
            }).catch(error => {
                reject(error)
            })
        })
    },

    // user logout
    logout({ commit, state, dispatch }) {
        return new Promise((resolve, reject) => {
            logout(state.token).then(() => {
                commit('SET_TOKEN', '')
                commit('SET_ROLES', [])
                removeToken()
                resetRouter()

                // reset visited views and cached views
                // to fixed https://github.com/PanJiaChen/vue-element-admin/issues/2485
                dispatch('tagsView/delAllViews', null, { root: true })

                resolve()
            }).catch(error => {
                reject(error)
            })
        })
    },

    // remove token
    resetToken({ commit }) {
        return new Promise(resolve => {
            commit('SET_TOKEN', '')
            commit('SET_ROLES', [])
            removeToken()
            resolve()
        })
    },

    // dynamically modify permissions
    changeRoles({ commit, dispatch }, role) {
        return new Promise(async resolve => {
            const token = role + '-token'

            commit('SET_TOKEN', token)
            setToken(token)

            const { roles } = await dispatch('getInfo')

            resetRouter()

            // generate accessible routes map based on roles
            const accessRoutes = await dispatch('permission/generateRoutes', roles, { root: true })

            // dynamically add accessible routes
            router.addRoutes(accessRoutes)

            // reset visited views and cached views
            dispatch('tagsView/delAllViews', null, { root: true })

            resolve()
        })
    }
}

export default {
    namespaced: true,
    state,
    mutations,
    actions
}
